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85 2.8 Backfires through Carburator won’t idle?


Joe Pecar

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1985
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Ford Bronco 2
Cannot get it to run smoothly enough to set the timing right. Sputters and pops through the carb? Help please?
 


alwaysFlOoReD

Blang - not bling
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4.0, 4.0, 4.6
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Backfires thru carb means its running lean. Check all vacuum lines for leaks and make sure the carb is bolted down firmly.
Have you done any work on it?
What's the history of it?
 

Joe Pecar

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Thank you for your response: Just purchased it.
It started and ran with a little priming and then seemed to loose power and die about 5 miles up the road. Replaced, plugs, wires, cap, rotor, ignition module and coil.
Trying to set timing but it keeps backfiring so its hard to get a good reading. Carb seems tight and no obvious vacuum leaks.
Which way with the distributor to advance timing?
 

alwaysFlOoReD

Blang - not bling
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Messages
205
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Location
Red Deer, Canada
Vehicle Year
'91, '93, '98
Vehicle
Various
Engine Size
4.0, 4.0, 4.6
Suspension Style
4wd
I've never worked on the 2.8. All my carb experience is on big block ford v8 and that was all 30+ years ago.
That said, what I keep hearing recommended is to do a carb swap to a 2150 carb and change the ignition to a duraspark. I'm pretty sure there is something in the tech section. I'm on my phone of would link something. Maybe later if you don't find something I can help better.
 

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